Stage characteristics for the development of late Quaternary paleosols in the Yangtze Delta area

The late Quaternary paleosols in the Yangtze Delta area developed in the period of 25 000-12 000 aBP. Phytolith ratios (value A) of contents of fan, square and rectangle types indicating the warm and humid climate to those of bar, hat and point types indicating cold and dry climates decrease upwards overall on profiles of the paleosols, suggesting that the climates turned from warm and humid to cold and dry. So, the paleosols developed mainly during the regression before the last glacial maximum. Changes of value A indicate no trend of warming, suggesting that the transgression was rapid after the last glacial maximum. The development of the paleosols exhibited obvious stages, which were controlled remarkably by transgression and regression : Ⅰ . Period of alternation of deposition and pedogenesis, which was from the occurrence of regresson before the last glacial maximum to the time when sea levels fell close to the lowest; Ⅱ . Exposure period with continual pedogenesis, which was terminated when the paleosols were drown in the post-glacial transgression; Ⅲ . Period of being drown and buried, the paleosols were buried by marine sediments, and reworked by early diagenesis.     

Isolation and identification of a novel STR (D17S2204) in the vicinity of NF1 locus

Using a synthetic oligonucleotide (dA-dC)15 as a probe to screen a probe pool made by microdissected human chromosome band 17q11-q12, a DNA fragment containing (CA)16 was isolated, which is a novel short tandem repeat (STR) determined by searching in the GenBank and GDB. It has 8 allelic types with a PIC value of 0.61. The novel STR is conformed with Mendelian segregation according to the linkage analysis of a three-generation neurofibromatosis type Ⅰ (NF1) pedigree. The STR was localized at chromosome band 17q11-q12 in the vicinity of NF1 gene by FISH analysis. The accession number of the STR in GenBank and GDB is G32112 and D17S2204 respectively.     

关于PAL电视信号优质化处理的研讨

本文提出一种可克服漏检问题的改进的运动检测方法。该方法用于Y／C分离和倍场处理,可提高电视图像的质量。     

具有迁移项的n体不可逆聚集过程的动力学行为

利用ｎ体不可逆聚集过程的动力学方程（广义Ｓｍｏｌｕｃｈｏｖｓｋｉ方程）,讨论了系统存在迁移作用时ｎ体不可逆聚集过程的动力学行为,而且得出了液胶（Ｓｏｌ）－凝胶相变的条件。同时,本文还讨论ｎ体不可逆聚集过程中非凝胶系统所出现的定态;当ｂ（ｔ）＝０时,凝胶系统发生液胶－凝胶相变的时间与非凝胶系统处于定态的时间相同。     

煤泥浮选生产数据管理系统

本文介绍煤泥浮选生产数据管理系统的网络硬件结构、主要功能和软件体系。系统软件在淮北选煤厂的投入使用,减轻了工人的劳动强度、强化了生产管理,并能改善控制效果,它与优化控制系统配合使用,能提高我国煤泥浮选综合自动化水平。     

集值鞅与拟鞅以及L~1-极限鞅关系定理

讨论了集值鞅、集值拟集、集值Ｌ１－极限鞅之间的关系,得到了集值鞅集值拟鞅集值Ｌ１－极限鞅,而集值Ｌ１－极限鞅可用集值鞅逼近,以及集值Ｌ１－极限鞅存在集值拟鞅子列等关系定理     

基于优先级的ATM网络拥塞控制

提出一种基于优先级的ATM网络拥塞控制方法.其主要特点：带有优先权控制功能,以适应不同业务对信无丢失率及时延的不同要求.即能最大限度地有效利用网络资源,又能满足不同用户对业务质量的不同要求,并能降低交换结构复杂度。并对这种控制方法进行性能分析。结果表明：在提高网络吞吐量、降低信元丢失率、改善网络延时等方面皆优于其它拥塞控制方法。     

16 QAM-OFDM高效调制解调器的设计

设计了一种适合移动通信的16QAMOFDM高效调制解调器,频谱效率达到33bit/s/Hz。设计中采用引导符号插入法进行衰落补偿。计算机模拟的结果表明采用二阶插值法的16QAMOFDM具有良好的性能和较强的实用价值。     

姬塬地区罗1井区长81油层组沉积相特征

摘要：姬塬地区位于鄂尔多斯盆地陕北斜坡中西部。与研究区其他层位相比,目的层长81油层属于新层系,虽经多年资料累积和研究,前人学者仍对其沉积相类型存在较大分歧,研究基础相对薄弱。本文通过岩心观察、薄片鉴定、测井曲线等资料的综合分析,结合前人研究成果,总结研究区目的层的沉积特征,从而判定姬塬地区罗1井区上三叠统长81油层组为浅水三角洲沉积体系,沉积相类型包括三角洲前缘亚相和三角洲平原亚相,并对其沉积特征和剖面结构进行讨论,进而预测其沉积相的平面展布特征。